Plowing and raking combination machine

Abstract

The utility model relates to the technical field of plowing machinery, in particular to a plowing and raking combination machine which comprises a frame and a deep plowing plough, a front drive axle, a rear drive axle, an engine, a gearbox and a first hydraulic cylinder are arranged on the frame, front wheels are arranged on the front drive axle, rear wheels are arranged on the rear drive axle, and the deep plowing plough is arranged on the frame. The free end of the first hydraulic cylinder is fixedly connected with the top end of the deep ploughing plough, a first suspension is arranged on the gearbox and connected with the front end of the deep ploughing plough, and the deep ploughing plough is located between the front wheel and the rear wheel. The utility model solves the problem that the deep ploughing plough of the intertillage harrow combination machine in the prior art is easily eroded and damaged by water when being directly placed on the ground.

Description

Technical Field

[0001] The utility model relates to the technical field of tillage machinery, in particular to a combined tillage and harrowing machine. Background Art

[0002] At present, in addition to transporting goods, a tractor can also be equipped with agricultural implements for agricultural operations such as plowing. However, the assembly positions of many existing tractors are limited, and usually only one agricultural implement can be assembled, resulting in the need for multiple tractors equipped with different agricultural implements to operate jointly during agricultural operations, causing inconvenience. In order to assemble multiple agricultural implements together, a combined tillage and harrowing machine can be used.

[0003] After the existing combined tillage and harrowing machine completes agricultural operations with a deep plow assembled, the deep plow is usually directly placed on the ground, resulting in the metal plow blocks of the deep plow being easily in contact with the water on the ground for a long time, and thus being eroded and damaged by the water on the ground, reducing the service life of the deep plow. Summary of the Utility Model

[0004] To solve the technical problem that the deep plow of the combined tillage and harrowing machine is easily eroded and damaged when directly placed on the ground, the utility model provides a combined tillage and harrowing machine.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A combined tillage and harrowing machine includes a vehicle frame, a front drive axle, a rear drive axle, an engine, a deep plow, a first suspension, and a first hydraulic cylinder. The vehicle frame includes a front vehicle frame and a rear vehicle frame, and the first end of the front vehicle frame is connected to the first end of the rear vehicle frame; the front drive axle is arranged on the front vehicle frame, and front wheels are arranged on the front drive axle; the rear drive axle is arranged on the rear vehicle frame, and rear wheels are arranged on the rear drive axle; the engine is arranged on the front vehicle frame and is used to drive the front wheels; the deep plow is arranged below the rear vehicle frame and between the front drive axle and the rear drive axle; the first end of the first suspension is rotatably connected to the first end of the front vehicle frame, and the second end of the first suspension is rotatably connected to the first end of the deep plow; the first hydraulic cylinder is arranged above the first end of the first suspension, the fixed end of the first hydraulic cylinder is rotatably connected to the first end of the front vehicle frame, and the free end of the first hydraulic cylinder is connected to the deep plow and is used to drive the deep plow to lift.

[0007] Optionally, it further includes a second hydraulic cylinder. The first end of the second hydraulic cylinder is connected to the middle of the deep plow, and the second end of the second hydraulic cylinder is rotatably connected to the rear vehicle frame and is used to assist the deep plow to lift.

[0008] Optionally, it further includes a flushing mechanism. The flushing mechanism includes a water storage tank and a flushing nozzle arranged on the water storage tank. The flushing mechanism is arranged on the rear vehicle frame, and the flushing nozzle is aligned with the deep plow for cleaning the deep plow.

[0009] Optionally, it further includes a straw returning machine. A third hydraulic cylinder and two second suspensions are arranged at the second end of the front vehicle frame. The free end of the third hydraulic cylinder and the two second suspensions are both connected to the straw returning machine. A support frame is fixedly arranged on the straw returning machine, and a support wheel is arranged at the front end of the support frame.

[0010] Optionally, it further includes a rotary tiller, a fourth hydraulic cylinder and two third suspensions. The first ends of the two third suspensions are connected to the rotary tiller, and the second ends are rotatably connected to the end of the second end of the rear vehicle frame. The first end of the fourth hydraulic cylinder is connected to the second end of the rear vehicle frame, and the second end of the fourth hydraulic cylinder is connected to the third suspension. The fourth hydraulic cylinder is used to drive the rotary tiller to lift.

[0011] Optionally, it further includes a connecting rod and a rolling press wheel. The first end of the connecting rod is connected to the rotary tiller, and the second end is connected to the rolling press wheel.

[0012] Optionally, it further includes a fertilizer tank. The fertilizer tank is arranged at the second end of the front vehicle frame for fertilizing.

[0013] Optionally, the deep plow includes a plow frame, a plurality of plow legs arranged below the plow frame, and a plowshare arranged on the plow legs. The plow frame is a V-shaped plow frame, and the first end of the plow frame is the tip of the V-shaped plow frame.

[0014] Optionally, the free end of the first hydraulic cylinder is connected to the deep plow through a connecting member. The connecting member includes a vertical connecting rod and an inclined connecting rod. The free end of the first hydraulic cylinder is respectively connected to the first ends of the vertical connecting rod and the inclined connecting rod. The second end of the vertical connecting rod is connected above the first end of the deep plow, and the inclined connecting rod is connected above the middle of the deep plow.

[0015] Optionally, a front steering central shaft is arranged at the connection between the front vehicle frame and the rear vehicle for controlling the steering of the front wheels.

[0016] Advantages of the present utility model:

[0017] 1. By adopting the first hydraulic cylinder and the first suspension, the deep plow of the present utility model can stay in the air without contacting the ground after completing agricultural operations, avoiding the direct erosion and damage of the metal plow blocks of the deep plow by the water on the ground, increasing the service life of the deep plow, and solving the problem that the deep plow of the tillage and harrowing combine is easily eroded and damaged when directly placed on the ground;

[0018] 2. This combined tillage and harrowing machine of the utility model can be combined with a straw returning machine, a deep plow, a rotary tiller, and a vibrating roller, so as to realize a relatively complete agricultural operation on farmland with one machine, avoiding the need for multiple tractors to operate simultaneously in agricultural operations, and improving the convenience and cost of agricultural operations.

[0019] 3. The utility model adopts a flushing mechanism to flush and clean the deep plow after agricultural operations, reducing the working intensity of workers for cleaning the mud blocks attached to the deep plow.

[0020] 4. With the auxiliary function of the second hydraulic cylinder of the utility model, the stability of the lifting of the deep plow is enhanced, ensuring the smoothness during the operation process.

[0021] 5. The design of the fertilizer tank of the utility model enables the fertilization work to be carried out synchronously with tillage, improving the efficiency and uniformity of fertilization.

[0022] 6. The design of the V-shaped plow frame and the layout of the plowshares of the utility model improve the adaptability of the deep plow to different soil conditions, ensuring the quality and depth of the tillage operation.

[0023] 7. The first hydraulic cylinder of the utility model is connected to the deep plow through a vertical connecting rod and an inclined connecting rod, dispersing the force, reducing the wear of the hydraulic cylinder, and extending the service life. During the process of lifting the deep plow, the first suspension rotates, and the deep plow rises towards the front frame direction, avoiding the deep plow from hitting the rear frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of an embodiment of a combined tillage and harrowing machine in the utility model;

[0025] Figure 2 is a top view structural diagram of an embodiment of a combined tillage and harrowing machine in the utility model;

[0026] Figure 3 is a schematic structural diagram of another perspective of an embodiment of a combined tillage and harrowing machine in the utility model;

[0027] Figure 4 is a schematic structural diagram of the deep plow in a raised state of an embodiment of a combined tillage and harrowing machine in the utility model;

[0028] Among them, 1 - vehicle frame, 101 - front vehicle frame, 102 - rear vehicle frame, 2 - front drive axle, 3 - rear drive axle, 4 - front wheels, 5 - rear wheels, 6 - engine, 7 - deep tillage plow, 701 - plow frame, 702 - plow legs, 703 - plowshares, 8 - connecting pieces, 801 - vertical connecting rod, 802 - diagonal connecting rod, 9 - first suspension, 10 - first hydraulic cylinder, 11 - cab, 12 - second hydraulic cylinder, 13 - water storage tank, 14 - third hydraulic cylinder, 15 - second suspension, 16 - straw returning machine, 17 - support frame, 18 - support wheels, 19 - rotary tiller, 20 - fourth hydraulic cylinder, 21 - third suspension, 22 - connecting rod, 23 - rolling press wheel, 24 - fertilizer tank. Detailed implementation manners

[0029] To deepen the understanding of the present utility model, the present utility model will be further described in detail below in conjunction with the drawings and embodiments. The embodiments are only used to explain the present utility model and do not limit the protection scope of the present utility model.

[0030] Embodiment:

[0031] As Figures 1-4 shown, a combined tillage and harrowing machine includes a vehicle frame 1, a front drive axle 2, a rear drive axle 3, an engine 6, a deep tillage plow 7, a first suspension 9 and a first hydraulic cylinder 10. The vehicle frame 1 includes a front vehicle frame 101 and a rear vehicle frame 102, and the first end of the front vehicle frame 101 is connected to the first end of the rear vehicle frame 102; the front drive axle 2 is arranged on the front vehicle frame 101, and front wheels 4 are arranged on the front drive axle 2; the rear drive axle 3 is arranged on the rear vehicle frame 102, and rear wheels 5 are arranged on the rear drive axle 3; the engine 6 is arranged on the front vehicle frame 101 for driving the front wheels 4; the deep tillage plow 7 is arranged below the rear vehicle frame 102 and between the front drive axle 2 and the rear drive axle 3; the first end of the first suspension 9 is rotatably connected to the first end of the front vehicle frame 101, and the second end of the first suspension 9 is rotatably connected to the first end of the deep tillage plow 7; the first hydraulic cylinder 10 is arranged above the first end of the first suspension 9, the fixed end of the first hydraulic cylinder 10 is rotatably connected to the first end of the front vehicle frame 101, and the free end of the first hydraulic cylinder 10 is connected to the deep tillage plow 7 for driving the deep tillage plow 7 to lift.

[0032] Specifically, after agricultural operations are completed, the staff starts the first hydraulic cylinder 10, and the free end of the piston rod of the first hydraulic cylinder 10 will drive the deep tillage plow 7 to move upward together, so that the entire deep tillage plow 7 is far away from the ground. At the same time, the first suspension 9 will support the deep tillage plow 7. The number of the first hydraulic cylinders 10 can be multiple, which is convenient for stably pulling the deep tillage plow 7 away from the ground. The rear drive axle 3 is a steering axle, and the drive and steering of this axle are integrated. The number of both the front wheels 4 and the rear wheels 5 is four, and the diameter of the front wheels 4 is larger than that of the rear wheels 5. A cab 11 is arranged on the rear vehicle frame 102. A gearbox is arranged below the engine. The engine 6 is also connected with a transmission assembly for driving the front wheels 4 to rotate. The transmission assembly can include a gear set and a belt.

[0033] Specifically, the first hydraulic cylinder 10 includes a piston rod, and the movement of the piston rod can control the lifting of the subsoiler 7. Thus, after the agricultural operation is completed, the subsoiler 7 can be lifted and stay in the air, avoiding contact with the ground, reducing the damage of water erosion to the metal plowshare of the subsoiler 7, effectively extending the service life of the subsoiler 7. Specifically, when the piston rod of the first hydraulic cylinder 10 extends, it can lift the subsoiler 7 upward. The frame 1 is designed to be able to carry and support all components, ensuring the stability of the tillage and harrowing combine on various terrains and the continuity of operation. The output power and torque of the engine 6 are adjusted by the gearbox to adapt to different soil conditions and operation requirements, ensuring the effective operation of the tillage and harrowing combine. The design of the first suspension 9 allows for fine-tuning of the subsoiler 7 during operation to adapt to different soil depths and hardness, ensuring the quality and uniformity of the tillage operation. The connection between the front frame 101 and the rear frame 102 uses high-strength materials to ensure the structural stability and durability during tillage. The number, size, and layout of the front wheels 4 and the rear wheels 5 are designed according to the actual operation requirements to achieve the best ground contact and traction. The tillage and harrowing combine also includes a cab 11, which provides an operation interface and protection for the operator, ensuring the comfort and safety of operation.

[0034] As a preferred example, it further includes a second hydraulic cylinder 12. The first end of the second hydraulic cylinder 12 is connected to the middle part of the subsoiler 7, and the second end of the second hydraulic cylinder 12 is rotatably connected to the rear frame 102 for assisting the lifting of the subsoiler 7.

[0035] Specifically, on the rear frame 102 of the tillage and harrowing combine, a second hydraulic cylinder 12 is added. Its first end is connected to the middle part of the subsoiler 7, specifically it can be a universal joint connection, while the second end is connected to the rear frame 102 by a rotational connection, specifically it can be a universal joint connection and can be connected to the rear frame 102 through a universal joint mechanism. The addition of the second hydraulic cylinder 12 provides additional lifting assistance for the subsoiler 7, which is particularly important during subsoiling operations, especially in harder or wetter soil conditions, and can more effectively control the lifting of the subsoiler 7, reducing the load on the first hydraulic cylinder 10. During operation, the first hydraulic cylinder 10 and the second hydraulic cylinder 12 can work together. By precisely controlling the telescoping of the piston rods of the two hydraulic cylinders, the stable lifting of the subsoiler 7 can be achieved. The layout of the second hydraulic cylinder 12 takes into account the overall balance of the tillage and harrowing combine and the convenience of operation, ensuring that the center of gravity of the subsoiler 7 remains stable during lifting and reducing the lateral pressure on the frame 1.

[0036] As a preferred example, it further includes a flushing mechanism. The flushing mechanism includes a water storage tank 13 and a flushing nozzle provided on the water storage tank 13. The flushing mechanism is arranged on the rear frame 102, and the flushing nozzle is aligned with the subsoiler 7 for cleaning the subsoiler 7.

[0037] Specifically, a flushing mechanism is added to the tillage and harrowing combine, which mainly consists of a water storage tank 13 and flushing nozzles. The water storage tank 13 is used to store cleaning water, and the flushing nozzles are responsible for spraying the water in the water storage tank 13 onto the deep tillage plow 7 for cleaning.

[0038] There can be multiple water storage tanks 13, which are respectively fixed on both sides of the rear vehicle frame 102. The position and capacity are designed to meet the water volume required for flushing the deep tillage plow 7, while considering the balance and stability of the overall machine. The flushing nozzles are installed on the water storage tank 13, and their spraying directions and angles are precisely calculated to ensure that all parts of the deep tillage plow 7 can be covered for comprehensive cleaning. The tillage and harrowing combine is equipped with a control system. The operator can control the start and stop of the flushing nozzles through the switch on the control panel to achieve cleaning on demand. The flushing nozzles are designed with a water flow adjustment function, and the water pressure and water volume can be adjusted according to the cleaning requirements to adapt to the cleaning of dirt with different degrees. The design of the flushing mechanism takes into account the convenience of maintenance. Both the water storage tank 13 and the nozzles are easy to disassemble and clean to ensure long-term effective use.

[0039] After the tillage is completed, the operator starts the flushing mechanism, and the flushing nozzles spray water precisely onto the deep tillage plow 7, effectively removing the attached soil and residues, reducing the wear of the deep tillage plow 7, and extending its service life.

[0040] As a preferred example, it further includes a straw returning machine 16. A third hydraulic cylinder 14 and two second suspensions 15 are arranged at the second end of the front vehicle frame 101. The free end of the third hydraulic cylinder 14 and the two second suspensions 15 are both connected to the straw returning machine 16. A support frame 17 is fixedly arranged on the straw returning machine 16, and a support wheel 18 is arranged at the front end of the support frame 17.

[0041] Specifically, at the second end of the front frame 101 of the rotary tiller and harrow combine, a straw returning machine 16 is added, which is used to crush crop straws and turn them into the soil to achieve the utilization of straw returning to the field. A third hydraulic cylinder 14 is installed at the second end of the front frame 101, and the free end of this hydraulic cylinder is connected to the straw returning machine 16, which is used to control the lifting of the straw returning machine 16 to adapt to different operating heights and depths. Two second suspensions 15 are provided, which are respectively connected to the straw returning machine 16 and the front frame 101, providing stable support and buffering functions to ensure the smoothness and adaptability of the straw returning machine 16 during operation. A support frame 17 is fixedly arranged on the straw returning machine 16, and a support wheel 18 is installed at the front end of the support frame 17. The support wheel 18 contacts the ground, which is used to support the weight of the straw returning machine 16 and keep it stable. The third hydraulic cylinder 14 and the two second suspensions 15 work together to ensure that the straw returning machine 16 can be adjusted to a suitable position according to the operation requirements to achieve efficient straw returning operation. The straw returning machine 16 can be adjusted according to different straw types and soil conditions to achieve the best straw returning effect. The integration of the straw returning machine 16 enables the rotary tiller and harrow combine to complete soil tillage while realizing the straw returning treatment, improving the efficiency and environmental protection of agricultural operations.

[0042] As a preferred example, it further includes a rotary tiller 19, a fourth hydraulic cylinder 20 and two third suspensions 21. The first ends of the two third suspensions 21 are connected to the rotary tiller 19, and the second ends are rotatably connected to the end of the second end of the rear frame 102. The first end of the fourth hydraulic cylinder 20 is connected to the second end of the rear frame 102, and the second end of the fourth hydraulic cylinder 20 is connected to the third suspension 21. The fourth hydraulic cylinder 20 is used to drive the rotary tiller 19 to lift.

[0043] Specifically, on the rear frame 102 of the rotary tiller and harrow combine, a rotary tiller 19 is optionally integrated, which is used to further break and mix the soil to improve the looseness of the soil. A fourth hydraulic cylinder 20 is installed at the second end of the rear frame 102. Its first end is fixedly connected to the rear frame 102, and the second end is connected to the two third suspensions 21, which is used to control the lifting action of the rotary tiller 19. Two third suspensions 21 are provided. Their first ends are connected to the rotary tiller 19, and the second ends are rotatably connected to the end of the second end of the rear frame 102, providing the support and adjustment functions required by the rotary tiller 19. Through the operation of the fourth hydraulic cylinder 20, the lifting of the rotary tiller 19 can be realized to adapt to different soil conditions and operating depth requirements. The design of the two third suspensions 21 ensures the stability of the rotary tiller 19 during operation and reduces mechanical shocks caused by terrain changes. The rotary tiller 19 can be adjusted in height and angle according to needs to achieve the best soil treatment effect. The coordinated operation of the fourth hydraulic cylinder 20 and the two third suspensions 21 ensures that the rotary tiller 19 can be accurately adjusted to a suitable working position.

[0044] The integration of the rotary tiller 19 enables the tillage and harrowing combine to further process the soil after completing soil tillage and straw returning to the field, improving the continuity and efficiency of agricultural operations.

[0045] As a preferred example, it further includes a connecting rod 22 and a vibrating compaction wheel 23. The first end of the connecting rod 22 is connected to the rotary tiller 19, and the second end is connected to the vibrating compaction wheel 23.

[0046] Specifically, one or more connecting rods 22 are arranged between the rotary tiller 19 and the vibrating compaction wheel 23 to achieve mechanical connection and force transmission between the two. The connecting rod 22 can be made of high-strength materials to ensure stability and durability when transmitting vibration force. The vibrating compaction wheel 23 is connected through the second end of the connecting rod 22 and is designed to vibrationally compact the soil clods broken by the rotary tiller 19 to facilitate subsequent soil seeding operations. The connecting rod 22 may include an adjustable part, allowing the operator to adjust the height and angle of the vibrating compaction wheel 23 as needed to adapt to different soil conditions and operation requirements. The vibrating compaction wheel 23 is designed to generate vibration to help further break and compact the soil, improving the seeding quality of the soil. The coordinated work of the connecting rod 22 and the vibrating compaction wheel 23: The connecting rod 22 transmits the power of the rotary tiller 19 to the vibrating compaction wheel 23, enabling the vibrating compaction wheel 23 to compact the soil in a timely manner after rotary tillage, improving operation efficiency.

[0047] The integration of the vibrating compaction wheel 23 enables the tillage and harrowing combine to further compact the soil after completing soil tillage and rotary tillage, improving the continuity of agricultural operations and the final seeding quality.

[0048] As a preferred example, it further includes a fertilizer box 24, which is arranged at the second end of the front frame 101, and the fertilizer box 24 is used for fertilization.

[0049] Specifically, at the second end of the front frame 101 of the tillage and harrowing combine, a fertilizer box 24 is added to store fertilizers and achieve fertilization operations synchronized with tillage. The fertilizer box 24 can be designed as a sealed structure to prevent fertilizers from getting damp or lost and to facilitate loading and unloading of fertilizers. An outlet for fertilizer is installed at the bottom or side of the fertilizer box 24, and the opening and closing of the outlet for fertilizer can be adjusted through a control device to control the flow rate and fertilization amount of fertilizers. The outlet for fertilizer of the fertilizer box 24 is synchronized with the working components of the tillage and harrowing combine through a conveying device such as a conveyor belt or a screw conveyor to ensure that fertilizers are evenly applied to the soil while tillage is being carried out. The capacity of the fertilizer box 24 is designed to meet the fertilization requirements for large-area tillage, reducing the frequency of filling fertilizers. The integration of the fertilizer box 24 enables the tillage and harrowing combine to achieve precise fertilization while completing soil tillage, improving the efficiency of agricultural operations and the quality of crop growth.

[0050] As a preferred example, the subsoiler 7 includes a plow frame 701, a plurality of plow legs 702 disposed below the plow frame 701, and a plowshare 703 disposed on the plow legs 702. The plow frame 701 is a V-shaped plow frame, and the first end of the plow frame 701 is the tip of the V-shaped plow frame.

[0051] Specifically, the subsoiler 7 includes a plow frame 701 designed in a V-shaped structure. This design can improve the efficiency and depth of plowing and adapt to different soil conditions. A plurality of plow legs 702 are disposed below the V-shaped plow frame. These plow legs 702 are evenly distributed below the plow frame 701 to support the plowshare 703 and perform soil tillage. A plowshare 703 is installed at the lower end of each plow leg 702. The design and material selection of the plowshare 703 take into account wear resistance and tillage efficiency to achieve good soil fragmentation and turnover effects. The first end of the plow frame 701 is designed as a tip, which helps reduce resistance when the subsoiler 7 enters the soil and improves the smoothness of tillage. The angles of the V-shaped plow frame and the plow legs 702 can be adjusted to adapt to different tillage depths and soil hardness to ensure tillage effects. Connection method of the subsoiler 7: The subsoiler 7 is connected to the vehicle frame 1 through the first suspension 9 and the first hydraulic cylinder 10 to ensure the accuracy of the lifting and adjustment of the subsoiler 7. The integration of the subsoiler 7 enables the tillage and harrowing combine to perform deep soil tillage, laying a good foundation for subsequent agricultural operations.

[0052] As a preferred example, the free end of the first hydraulic cylinder 10 is connected to the subsoiler 7 through a connecting member 8. The connecting member 8 includes a vertical connecting rod 801 and an inclined connecting rod 802. The free end of the first hydraulic cylinder 10 is respectively connected to the first ends of the vertical connecting rod 801 and the inclined connecting rod 802. The second end of the vertical connecting rod 801 is connected above the first end of the subsoiler 7, and the inclined connecting rod 802 is connected above the middle of the subsoiler 7.

[0053] Specifically, the connecting member 8 is composed of a vertical connecting rod 801 and an inclined connecting rod 802, forming a stable triangular support structure to improve the stability and load-bearing capacity when the subsoiler 7 is lifted and lowered. The first end of the vertical connecting rod 801 is connected to the free end of the first hydraulic cylinder 10, and the second end is connected above the first end of the subsoiler 7, providing vertical support force. The first end of the inclined connecting rod 802 is also connected to the free end of the first hydraulic cylinder 10, and its second end is connected above the middle of the subsoiler 7, providing inclined support force to enhance the stability of the subsoiler 7. The free end of the first hydraulic cylinder 10 can be connected to the first ends of the vertical connecting rod 801 and the inclined connecting rod 802 through an articulated mechanical connection. By controlling the telescopic movement of the first hydraulic cylinder 10, the vertical connecting rod 801 and the inclined connecting rod 802 work together to achieve the smooth lifting and lowering of the subsoiler 7. The lengths and angles of the vertical connecting rod 801 and the inclined connecting rod 802 are carefully designed to ensure the best mechanical performance and working angle during the lifting and lowering process of the subsoiler 7. The design of the connecting rod 22 allows for quick maintenance and adjustment to adapt to different working conditions and the working depth of the subsoiler 7. The arrangement of the vertical connecting rod 801 and the inclined connecting rod 802 makes the force on the subsoiler 7 more evenly distributed during the lifting and lowering process, reducing the wear of the hydraulic cylinder and extending its service life. The first hydraulic cylinder 10 is connected to the subsoiler 7 through the vertical connecting rod 801 and the inclined connecting rod 802, dispersing the force, reducing the wear of the hydraulic cylinder, and extending its service life. When the subsoiler 7 is lifted, the first suspension 9 rotates, and the subsoiler 7 rises towards the front frame 101, avoiding the subsoiler 7 hitting the rear frame 102

[0054] As a preferred example, a front steering central axis is provided at the connection between the front frame 101 and the rear frame, for controlling the steering of the front wheels 4.

[0055] Specifically, at the connection between the front frame 101 and the rear frame, a front steering central axis is specially provided. This central axis is a key component for realizing the steering of the front wheels 4. The front steering central axis is connected to the steering system of the front wheels 4, and through mechanical linkages, gears or other transmission mechanisms, the operating force is transmitted to the front wheels 4 to achieve steering control. The design of the front steering central axis ensures the accuracy of the steering operation, enabling the tillage and harrowing combine to turn flexibly during field operations and improving the operation efficiency. The structural design of the front steering central axis ensures stability during the steering process, reducing the distortion or damage of the frame 1 caused by steering. The connection design of the front steering central axis with the front frame 101 and the rear frame 102 enables good collaborative work, ensuring the stability of the overall machine and the flexibility of operation. Through the steering of the front wheels 4 controlled by the front steering central axis, the tillage and harrowing combine can turn quickly and accurately in the field, reducing the turning time and improving the operation efficiency.

[0056] The above embodiments shall not limit the present utility model in any way, and all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present utility model.

Claims

1. A combined plowing and harrowing machine, characterized in that, including, a frame (1), the frame (1) includes a front frame (101) and a rear frame (102), and the first end of the front frame (101) is connected to the first end of the rear frame (102); a front drive axle (2), the front drive axle (2) is arranged on the front frame (101), and front wheels (4) are arranged on the front drive axle (2); a rear drive axle (3), the rear drive axle (3) is arranged on the rear frame (102), and rear wheels (5) are arranged on the rear drive axle (3); an engine (6), the engine (6) is arranged on the front frame (101) and is used to drive the front wheels (4); a subsoiler (7), the subsoiler (7) is arranged below the rear frame (102) and between the front drive axle (2) and the rear drive axle (3); a first suspension (9), the first end of the first suspension (9) is rotatably connected to the first end of the front frame (101), and the second end of the first suspension (9) is rotatably connected to the first end of the subsoiler (7); a first hydraulic cylinder (10), the first hydraulic cylinder (10) is arranged above the first end of the first suspension (9), the fixed end of the first hydraulic cylinder (10) is rotatably connected to the first end of the front frame (101), and the free end of the first hydraulic cylinder (10) is connected to the subsoiler (7) and is used to drive the subsoiler (7) to lift; also includes a straw returning machine (16) and a rotary tiller (19).

2. The combined tillage and harrowing machine according to claim 1, characterized in that, also includes a second hydraulic cylinder (12), the first end of the second hydraulic cylinder (12) is connected to the middle of the subsoiler (7), and the second end of the second hydraulic cylinder (12) is rotatably connected to the rear frame (102) and is used to assist the subsoiler (7) to lift.

3. The combined tillage and harrowing machine according to claim 1, characterized in that, also includes a flushing mechanism, the flushing mechanism includes a water storage device (13) and a flushing nozzle arranged on the water storage device (13), the flushing mechanism is arranged on the rear frame (102), and the flushing nozzle is aligned with the subsoiler (7) and is used to clean the subsoiler (7).

4. A combined tillage and harrowing machine according to claim 1, characterized in that, The second end of the front frame (101) is provided with a third hydraulic cylinder (14) and two second suspensions (15), the free end of the third hydraulic cylinder (14) and the two second suspensions (15) are both connected to the straw returning machine (16), a support frame (17) is fixedly arranged on the straw returning machine (16), and a support wheel (18) is arranged at the front end of the support frame (17).

5. A combined tillage and harrowing machine according to claim 1, characterized in that, also includes a fourth hydraulic cylinder (20) and two third suspensions (21), the first ends of the two third suspensions (21) are connected to the rotary tiller (19), the second ends are rotatably connected to the end of the second end of the rear frame (102), the first end of the fourth hydraulic cylinder (20) is connected to the second end of the rear frame (102), the second end of the fourth hydraulic cylinder (20) is connected to the third suspension (21), and the fourth hydraulic cylinder (20) is used to drive the rotary tiller (19) to lift.

6. A combined tillage and harrowing machine according to claim 5, characterized in that, also includes a connecting rod (22) and a rolling press wheel (23), the first end of the connecting rod (22) is connected to the rotary tiller (19), and the second end is connected to the rolling press wheel (23).

7. A combined tillage and harrowing machine according to claim 1, characterized in that, It further includes a fertilizer tank (24) which is arranged at the second end of the front vehicle frame (101), and the fertilizer tank (24) is used for fertilizing.

8. A combined tillage and harrowing machine according to claim 1, characterized in that, The subsoiler (7) includes a plow frame (701), a plurality of plow legs (702) arranged below the plow frame (701), and a plowshare (703) arranged on the plow legs (702). The plow frame (701) is a V-shaped plow frame, and the first end of the plow frame (701) is the tip of the V-shaped plow frame.

9. A combined tillage and harrowing machine according to claim 1, characterized in that, The free end of the first hydraulic cylinder (10) is connected to the subsoiler (7) through a connecting member (8). The connecting member (8) includes a vertical connecting rod (801) and an inclined connecting rod (802). The free end of the first hydraulic cylinder (10) is respectively connected to the first ends of the vertical connecting rod (801) and the inclined connecting rod (802). The second end of the vertical connecting rod (801) is connected above the first end of the subsoiler (7), and the inclined connecting rod (802) is connected above the middle part of the subsoiler (7).

10. The combined cultivator according to claim 1, characterized in that, A front steering central shaft is arranged at the connection between the front vehicle frame (101) and the rear vehicle frame for controlling the steering of the front wheels (4).

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